In your opinion if you get a lenses swapped out in a pair of glasses and the opticians mange to crack your frames in 3 places whos responsible? they supplied both frame and lenses.
I wanted to do this a couple of years ago. Two suppliers - one online and t'other a supermarket - had small print which said it was my risk if the frame cracked or otherwise failed to work as intended. Some plastics get brittle with age, apparently.
Hmm they are saying its my fault even though she spent 30+ minutes trying to force them in with repeated heatings etc they never made me aware it was my risk and apparently i paid more to make it my responsibility. I got told the price for the lenses 155 and that was it.